What are Digital Hearing Aids?

The digital hearing aid automatically collects the sound signal type, signal-to-noise ratio, and difference between the front and rear microphone strength of the environment in which it is located, defines different environments, and automatically adjusts characteristics such as noise reduction, direction, and compression ratio to adapt to the changing environment. It avoids the phenomenon that the users of the simulator "cannot hear in a low voice and are uncomfortable in a loud voice".

Digital hearing aids automatically identify and compress acoustic signals at noisy frequencies in a noisy environment, with emphasis on speech

Digital hearing aids rely on the powerful computing technology of computer chips to automatically control the user's hearing compensation needs. Basically, there is no need to adjust the trimmer switch by yourself, to avoid the improper adjustment of the box hearing aid user, the possibility that the hearing aid becomes a noise source, and the possibility of hearing aid failure. All digital hearing aids have high speech intelligibility, good sound quality, comfortable hearing, smooth communication, and can effectively protect residual hearing and prevent the occurrence of hearing deprivation.

Digital hearing aids are small in size and beautiful in appearance. The application of nano-waterproof materials is more waterproof and durable, and has a long service life. Box-type hearing aids are bulky, have a headphone cable, and are not waterproof and prone to failure.

With the introduction of digital signal processing technology, the development of hearing aid technology has changed dramatically. In addition to digitizing traditional hearing aid amplification technologies such as traditional multi-channel compression technology, many new technologies have been created that were previously unachievable with analog circuits. In the future, more and more people will choose digital hearing aids.

Automatically adapt to the environment, effectively reduce noise and improve speech intelligibility. It mimics the normal cochlear function of human, which enables patients to improve their adaptability to different sound environments. No matter how loud the sound is, the patients have no discomfort. Reproduce natural sounds, optimize patients' feelings about their own sounds, and improve the naturalness, authenticity, and comfort of sounds. Automatically eliminate feedback sound. Apply digital feedback suppression technology so that hearing aids don't. Annoying feedback sounds (howling) appear, which play an important role in improving the patient's language discrimination ability. Introducing the concept of a computer platform, the function of hearing aids can be enhanced with the upgrade of optional software for hearing aids, which can maintain the advanced nature of their functions without replacing the hearing aids.

The first domestic intelligent digital hearing aid chip was successfully developed by the Institute of Microelectronics of the Chinese Academy of Sciences. This is the first core SoC chip for a hearing aid in China, and it is a true single-chip fully integrated hearing aid solution. The chip has passed the hearing aid industry test standards, and various performance and power consumption indicators meet the international demand for mid-range hearing aid products. This result is of great significance to promote the development of China's hearing aid industry from manufacturing to innovation.

The hearing aid SoC chip uses a single-chip fully integrated solution. Among them, the low-noise AFE includes an adaptive preamplifier circuit PGA and a low-noise 16-bit ADC; the low-power DSP includes a dedicated instruction set processor ASIP and several coprocessors. Based on this SoC chip, you only need to equip a microphone, speakers, EEPROM, zinc air battery and a small amount of capacitors to build a typical hearing aid system. The SoC chip can also be programmed to be used in other fields such as sound acquisition and voice noise reduction. ^[1]